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Jewels are used in instruments for the purpose of Bearing.

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The type of instruments used mainly for standardizing instruments in laboratories is (a) Indicating instrument (b) Integrating instrument (c) Absolute instrument (d) Recording instrument  

asked May 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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asked Jun 17, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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The material of hair spring used in measuring instruments is made of which of material of the following : (a) Copper (b) Bronze (c) Alnico (d) None of these

asked May 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 27 views

Eddy current damping is normally used in the instruments of (a) Induction type (b) Moving iron type (c) Permanent magnet moving coil type (d) Nothing can be said 

asked May 25, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 14 views

Zero-sequence current is used for relaying purpose only in the case of   (a) Phase over current relay (b) Phase impedance relay (c) Ground over current relay (d) Ground impedance relay

asked May 13, 2018 in Switchgear And Protection by Shimroz123
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Electrostatic type instruments are primarily used as 

asked May 23, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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Which of the following instruments can be used to measure AC current only? (a) Permanent Magnet Type ammeter(b) Induction type ammeter (c) Moving iron voltmeter(d) Moving iron ammeter

asked Mar 28, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 11 views

Weins bridge is used for measurement of frequency in the applied voltage waveform is measurement of frequency in the applied voltage waveform is   (A)sinusoidal (B) square (C) rectangular (D) triangular

asked May 17, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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State the material used for moving coil and former for PMMC instruments. 

asked Sep 5, 2018 by Shimroz123
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The force required to move the pointer in an indicating instruments is

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"DC series motor is used for traction purpose." Justify your answer with any six characteristics.

asked Oct 12, 2018 in Industry Electrical Systems-II by Shimroz123
1 answer 8 views

As per Electricity Act, ____________means any line which is used for carrying electricity for any purpose.  (A) Electric line (B) Transmission line (C) All of the above (D) None of the above

asked May 8, 2018 in Electrical Engineering by Shimroz123
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asked Sep 6, 2018 by Shimroz123
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For measurement of low resistance, the bridge used is (a) Wheatstone (b) Kelvin (c) Maxwell (d) Anderson

asked May 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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Thermocouple instruments can be used for a frequency range upto   (a) 100Hz (b) 5000 Hz (c) 1 MHz (d) 50 MHz and above 

asked May 13, 2018 in Instrumentation and control by Shimroz123
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Moving iron instruments can be used for measuring (1) Direct currents and voltages (2) Radio frequency currents (3) A.C currents and voltages (4) Both (a) and (c)

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
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 Highest flux density exists inside which of the following instruments? A) Electrodynamic instruments B) Hot wire instruments C) Moving iron instruments D) Moving coil instruments

asked Jun 4, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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Which of the following instruments is equally accurate on ac as well as dc circuits ? (a) PMMC voltmeter (b) Dynamometer wattmeter (c) Moving iron ammeter (d) Induction wattmeter 

asked May 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 13 views

In a 3-phase voltage source inverter used for speed control of induction motor, anti-parallel diodes are used across each switching device. The main purpose of diodes is to:

asked May 22, 2018 in Induction Machine by Shimroz123
1 answer 39 views

Regulating-transformers are used in power systems for control of

asked Apr 26, 2018 in Switchgear And Protection by Shimroz123
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Regulating transformers are used in power systems for control of : a) voltage b) power factor c) power flow d) all of the above

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
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The large d.c. motors used in steel rolling mills are always provided with compensating . windings for (a) opposing the armature mmf (b) maintaining the voltage (c) maintaining the speed (d) none of these

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
1 answer 5 views

List three types of errors in measuring instruments. Give reasons of occurring for any one of them.

asked Sep 6, 2018 by Shimroz123
1 answer 21 views

The main purpose of permanent magnet motors are (A) to avoid the need for field supply (B) to provide high flux density (C) to provide control over flux level (D) to facilitate kW rating

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
0 answers 325 views

The purpose of following program fragment  b = s + b;  s = b - s;  b = b - s;  where s and b are two integers is to  (1) transfer the contents of s to b (2) transfer the contents of b to s (3) exchange the contents of s and b (4) negate the contents of s and b

asked Apr 10, 2018 in Computer Engineering by Shimroz123
1 answer 29 views

 For the protection of parallel feeders fed from one end, the relays used are: A) non-directional relays at the source-end and directional relays at the load-end B) non-directional relays at both the ends C) directional relays at the source-end and non-directional at the load-end D) directional relays at both the ends

asked Jun 4, 2018 in Switchgear And Protection by Shimroz123

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